Hey, did you hear the one about the two women fighting in a Wal-Mart? It's a real gas! No, really, that's not a punchline. Two women threw ammonia and bleach at one another and created poisonous gas in a Wall-Mart:

Two woman involved in an altercation at southern Baltimore County Walmart store threw bleach and another chemical on each other, causing possible injuries for other customers on Saturday, police and fire officials said. Baltimore County Fire Department's hazardous materials units responded to the scene around 11 a.m., and at least one patient has been transported to Wilmer Eye Clinic, spokesman Glenn Blackwell said in an email. Two additional people were taken to Baltimore Washington Medical Center, police spokesman Shawn Vinson said in an email.

So far one person has been arrested. And, in case you were wondering about what happens when you combined ammonia with bleach it's pretty nasty—and potentially deadly!

Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. The primary toxic chemical formed by the reaction is chloramine vapor, with a potential for hydrazine formation

The fumes are what get ya, although with a little extra ammonia the concoction gets explosive. Stay away! In the event of contamination, move in the opposite direction from the chemicals and call 911. Also, don't get in a chemical fight in the middle of a Wal-Mart. Falling prices? Cool. Falling dead people...not so much. [The Baltimore Sun]